Question 7 solve the following system of equations by using the elimination method. -4x – 2y = -12 4x + 8y = -24 (5, 3) (-6, -6) (3, 1) (6, -6)

To solve this problem you must apply the proccedure shown below:

1. You have the following system of equation:

2. As you can see, you can cancel out the variable , because it has equal coefficient with different signs at both equations. Then, if you add both equations, you obtain:

3. Let's substitute the value obtained into the second equation to calculate the other variable:

The answer is: (6,-6).

true !

step-by-step explanation:

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles